1. unmoving, immobile, inoperative. 1, 2. Inactive,dormant,inert,sluggish,torpid suggest lack of activity. Inactive indicates absence of action, indisposition to activity, or cessation of activity: an inactive compound, life, file of papers.Dormant suggests the quiescence or inactivity of that which sleeps but may be roused to action: a dormant volcano.Inert suggests the condition of dead matter, with no inherent power of motion or action; it may also mean unable to move, or heavy and hard to move: an inert mass; inert from hunger.Sluggish expresses slowness of natural activity or of that which does not move readily or vigorously: a sluggish stream, brain.Torpid suggests a state of suspended physical powers, a condition particularly of animals that hibernate: Snakes are torpid in cold weather.3. lazy, idle, slothful.